FixedOutputHooks are now used _strictly_ for the MSG0 command.

FixedOutputHooks are now used _strictly_ for the MSG0 command.
This prevents vcard/icalendar dumps onto the screen, when the pretty
rendering is already there.  Since MSG0 is now only used for the
full text search, the readability of vard/icalendar text dumps has
been reduced in order to prevent mega-indices of words like 'vcard'
and 'attendee'.  Because of this, the wordbreaker ID has been
incremented and your index will be forcibly rebuilt.